Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752971AbbGAIzR (ORCPT ); Wed, 1 Jul 2015 04:55:17 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:43575 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750936AbbGAIzN (ORCPT ); Wed, 1 Jul 2015 04:55:13 -0400 Date: Wed, 1 Jul 2015 09:55:07 +0100 From: Al Viro To: Andrey Ryabinin Cc: Linus Torvalds , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: Re: [git pull] vfs part 2 Message-ID: <20150701085507.GE17109@ZenIV.linux.org.uk> References: <20150415181406.GL889@ZenIV.linux.org.uk> <5538C66F.4050404@samsung.com> <20150621211213.GA18732@ZenIV.linux.org.uk> <5587F943.3040006@samsung.com> <20150701062752.GC17109@ZenIV.linux.org.uk> <55939BE3.6040902@samsung.com> <20150701082753.GD17109@ZenIV.linux.org.uk> <5593A7A0.6050400@samsung.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5593A7A0.6050400@samsung.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1304 Lines: 32 On Wed, Jul 01, 2015 at 11:41:04AM +0300, Andrey Ryabinin wrote: > On 07/01/2015 11:27 AM, Al Viro wrote: > > > > Could you check if 3.19 was getting anything similar? I.e. in > > p9_client_write() there add > > if (count > rsize) > > printk(KERN_ERR "bogus RWRITE: %d -> %d\n", rsize, count); > > just before > > p9_debug(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); > > and see if that triggers... > > > > Yeah, the same thing: > [ 125.962374] bogus RWRITE: 27 -> 4096 > [ 207.587632] bogus RWRITE: 27 -> 4096 > [ 215.055627] bogus RWRITE: 27 -> 4096 > [ 235.583138] bogus RWRITE: 27 -> 4096 > [ 245.749174] bogus RWRITE: 27 -> 4096 > [ 246.759270] bogus RWRITE: 27 -> 4096 > [ 248.020787] bogus RWRITE: 27 -> 4096 Hrm... Could you add (int)req->rc->id, (int)req->rc->tag and (int)req->tc->tag to that printk (on either kernel, the problem's apparently not new)? The question is whether we are mismatching replies, sending bogus requests or if it's really the server sending bogus replies. Which qemu version are you using, BTW? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/